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Validity
of Home Studies
Our
recording system is the most highly validated portable system
available. It accurately measures the necessary physiological
parameters to diagnose obstructive
sleep apnea syndrome (OSAS) as determined by the American
Academy of Sleep Medicine. The data
include heart rate, respiratory effort, nasal-oral airflow,
oxygen saturation, body position, and snoring intensity and
frequency.
Home-based
sleep testing is now widely accepted in the medical and scientific
communities. Veterans Affairs Hospitals, University of California
Medical Centers, and Kaiser Permanente Hospitals across the
country are utilizing home-based testing. Research has shown
that a typical sleep apnea patient can be diagnosed and treated
entirely outside the polysomnography laboratory. Moreover,
home-based sleep testing is a viable tool for reducing overall
costs.
Validity of Empiric
CPAP Pressure Determination
There are numerous ways to arrive at a level of
pressure with which to begin nasal CPAP therapy. Among these
are in-lab manual titrations, the use of auto-titrating CPAP
machines, and the use of predictive equations.
Sleep
Data provides a recommended starting CPAP pressure for those
who do not have access to manual titration or auto-titration.
This equation takes into account three factors: body weight,
neck circumference, and apnea severity. Sleep Data believes
that with proper follow-up the use of this equation is an
excellent way to initiate CPAP therapy. The equation that
we use has been shown to predict a starting pressure within
2 cm of H2O of that determined by manual titration in over
90% of the patients assessed.
References
- Home Study
1.
Ballester, E. et al, Evaluation of a portable respiratory
recording device for detecting apneas and hypopneas in
subjects from a general population. Eur Respir J: 2000, Jul;
16(1):123-7.
2. Parra O, Garcia-Esclasans N, Montserrat JM, Garcia Eroles
L, Ruiz J, Lopez JA, Guerra JM, Sopena JJ. Should patients
with sleep apnea/hypopnea syndrome be diagnosed and managed on
the basis of home sleep studies? Eur Respir J,
1997;10:1720-24.
3. Ferber, R. et al, Portable recording in the assessment of
obstructive sleep apnea. Sleep. 1994, 17:378-92.
4. Redline, S. et al, Measurement of sleep-related breathing
disturbances in epidemiologic studies. Chest: 1991, Nov;
100(5):1281-1286.
5. Emsellem HA, Corson WA, Rappaport BA, Hackett S, Smith LG,
Hausfeld JN. Verification of sleep apnea using a portable
sleep apnea screening device. South Med J. 1990;83:748-52.
References
- Empiric CPAP
6.
Fitzpatrick MF, Alloway C, Wakeford TM, MacLean AW, Munt PW,
Day AG, Can patients with obstructive sleep apnea titrate
their own continuous positive airway pressure? Am J Resir
Critical Care Med 2003; 167:716-722.
7.
Hoffstein V, Mateika S. Predicting nasal continuous positive
airway pressure. Am J Respir Crit Care Med 1994; 150:486-488.
8. Miljeteig H, Hoffstein V. Determinants of continuous
positive airway pressure level for treatment of obstructive
sleep apnea. Am Rev Respir Dis 1993; 147:1526-30.
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